494 



THE AXATOMY OF THE HORSE 



lateral lobes are flattened and oval, to corresponil witli the inferior surfaces 

 of the tentorium cerebelli. The cerebellum is made up of alternate layers 

 of grey and white matter, the former being distributed throughout the 

 interior in such a way that when sliced it presents an arborescent appearance. 

 On parting the hemispheres of the cerebrum, the convolutions on tlie surface 

 of which are composed of grey matter, a white band slightly striped from 



Fio 



■View of the Supeuiok Slkkace of the Escf.phai.on. 



n Anterior tennination of the longitudinal fissure. 

 h. b. Lateral hcmif-pheres of the cerebrum, 

 c. c. c. Corpus callosum. 



<?. Jliddle lobe of the cerebellum. 



c. (. Superior uieilian fissure. 



/. </. Membranes covering the spinal cord. 



side to side makes its appearance. This is the corpus callosum, which is 

 the great commissure, and consists entirel}' of white fibrous matter, uniting 

 the two halves. Beneath this, on each side, are the lateral ventricles, and 

 Avithin each are the optic thalamus and corpus striatum, with the choroid 

 jilexus l^'ing between. Turning the brain with its inferior surface in view 

 it presents anteriorly the continuation of the longitudinal fissure. On each 

 side of this are the olfactory nerves, which look like prolongations of the 

 hemispheres. Close behind these two are the optic or second pair of nerves, 

 connected together bv their commissure. Then two small white bodie«. the 



